Re: [Jepp-users] installing issues

[Mike J. <mi...@pu...>]

Hi,

What are the contents of the `jep` script (added by the pip install)?

There will be several environment variables defined there to make sure the
correct python bin and libraries are loaded. If you're trying to run from
Eclipse, you'll need to make sure those same env variables are setup. The
message you're getting means that the C jni library is not found by Java,
which should be solved by setting the right LD_LIBRARY_PATH.

- Mike

On Thu, Feb 21, 2013 at 6:30 AM, Várhegyi Balázs <var...@gm...>wrote:

> Hello,
>
> I would like to run python from java, I've found this sample class (last
> part of the mail) my main goal it to make this class usable. I use
> ubuntu 12.04. I added the jep.jar from "/usr/local/lib/jep" to the
> project as an external jar in Eclipse.
> But when I run it it fails in this line "Main main = new Main();" with:
>
> Exception in thread "main" java.lang.UnsatisfiedLinkError: no jep in
> java.library.path
>      at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1738)
>      at java.lang.Runtime.loadLibrary0(Runtime.java:823)
>      at java.lang.System.loadLibrary(System.java:1028)
>      at jep.Jep.<clinit>(Jep.java:138)
>      at Main.<init>(Main.java:16)
>      at Main.main(Main.java:32)
>
> maybe I didn't set something properly, I've just installed python2.7.2,
> it works.
> Then I followed these instructions:
> https://github.com/mrj0/jep/blob/master/README.rst
> I used this: 'pip install jep'
> Furthermore, I downloaded the latest version of jep(3.1.0) from here
> https://sourceforge.net/projects/jepp/ too.
>
> After this I should have set the LD_LIBRARY_PATH, and LD_PRELOAD
> according to the jep script (It was told on:
> https://github.com/mrj0/jep/blob/master/README.rst).
> However, I have two of them (I set the second.):
>
> the two jep script:
> 1, in the usr/local/bin, it says:
> LD_LIBRARY_PATH="/usr/local/lib/python2.7/dist-packages/"; export
> LD_LIBRARY_PATH
> LD_PRELOAD="/usr/lib/libpython2.7.so"; export LD_PRELOAD
> 2, in the downloaded_jep_folder/build/scripts-2.7, it says:
> LD_LIBRARY_PATH="/usr/local/lib/python2.7/site-packages/"; export
> LD_LIBRARY_PATH
> LD_PRELOAD="/usr/local/lib/libpython2.7.a"; export LD_PRELOAD
>
> If i running the test "python setup.py test", I get the following output:
>
> running test
> jep runtests.py
> ..........................EEEE.
> ................
> ======================================================================
> ERROR: test_batch (tests.test_jdbc.TestJdbc)
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>    File "tests/test_jdbc.py", line 16, in setUp
>      findClass('org.sqlite.JDBC')
> JavaException:  org/sqlite/JDBC
>
> ======================================================================
> ERROR: test_datetime (tests.test_jdbc.TestJdbc)
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>    File "tests/test_jdbc.py", line 16, in setUp
>      findClass('org.sqlite.JDBC')
> JavaException:  org/sqlite/JDBC
>
> ======================================================================
> ERROR: test_dbapi_primitives (tests.test_jdbc.TestJdbc)
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>    File "tests/test_jdbc.py", line 16, in setUp
>      findClass('org.sqlite.JDBC')
> JavaException:  org/sqlite/JDBC
>
> ======================================================================
> ERROR: test_java_sql (tests.test_jdbc.TestJdbc)
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>    File "tests/test_jdbc.py", line 16, in setUp
>      findClass('org.sqlite.JDBC')
> JavaException:  org/sqlite/JDBC
>
> ----------------------------------------------------------------------
> Ran 47 tests in 0.049s
>
> FAILED (errors=4)
>
> That would be great if someone could help me.
> Thanks in advance,
> Balazs Varhegyi
>
>
> Sample class:
>
> import java.util.logging.Level;
>
> import java.util.logging.Logger;
>
> import jep.Jep;
>
> import jep.JepException;
>
> /**
>
>   *
>
>   * @author sganapat
>
>   */
>
> public class Main {
>
>      private Jep objJep;
>
>
>
>      Main() {
>
>          try {
>
>              objJep = new Jep();
>
>          } catch (JepException ex) {
>
>              Logger.getLogger(Main.class.getName()).log(Level.SEVERE,
> null, ex);
>
>          }
>
>      }
>
>      /**
>
>       * @param args
>
>       *            the command line arguments
>
>       */
>
>      public static void main(String[] args) {
>
>          System.out.println("Hello");
>
>
>
>          try {
>
>              Main main = new Main();
>
>              main.executeCommand();
>
>              //main.executeScript();
>
>          } catch (JepException ex) {
>
>              Logger.getLogger(Main.class.getName()).log(Level.SEVERE,
> null, ex);
>
>          }
>
>      }
>
>      /**
>
>       * Executes Python Commands
>
>       *
>
>       * @throws JepException
>
>       */
>
>      private void executeCommand() throws JepException {
>
>          objJep.eval("print 'Hello Java'");
>
>      }
>
> }
>
>
>
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